12 Pack - CleverDelights Black Prewound Bobbins - 60wt - Size A Class 15 Bobbins - SA156 Replacement - For Brother Embroidery Machines - 7/16" x 13/16" 12 Black Prewound Bobbins 60 Weight - 100% Polyester High Tenacity Bobbin Thread - Approximately 125 Yards per Bobbin Size A Bobbins - 7/16" x 13/16" -- Perfect Replacement for Model SA156 (XA5539-151) Bobbins Works perfectly with most Brother embroidery machines including SE400, SE425, SE600, SE1900, PE525, PE540D, PE770, LB6800PRW and more -- See product description for full compatibility list CleverDelights brand